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Comparison · Comms
Rocket.Chat vs Stalwart
A side-by-side editorial comparison of Rocket.Chat and Stalwart — release velocity, themes, recent moves, and the top alternatives to consider.
Rocket.Chat vs Stalwart: at a glance
What is Rocket.Chat?
Six release candidates into 8.7, and five of them are version bumps.
Rocket.Chat is six candidates deep into 8.7.0, and the visible content of that train is thin. Five of the six most recent entries carry an identical body: a Meteor package bump with internal typings following. The engine floor holds steady across the whole window at Node 22.22.3, Deno 2.3.1, MongoDB 8.0, and Apps-Engine 1.65.1-rc.0. The one substantive change in the cycle sits back in 8.7.0-rc.0, which added session identification to the device management API.
What is Stalwart?
Stalwart is shipping email's next-generation auth stack while the specs are still in draft.
Stalwart is an all-in-one mail and collaboration server — SMTP, IMAP, JMAP, CalDAV, CardDAV and WebDAV in one binary — releasing every one to two weeks on the 0.16.x line. The last two months read as a standards campaign: DKIM2 and the full DMARCbis set in 0.16.12, VAPID push in 0.16.14, FreeBSD support in 0.16.13, and a run of IMAP extensions (UIDONLY, UIDBATCHES, MESSAGELIMIT/SAVELIMIT) in 0.16.17. Between the additions, most of each release is JMAP conformance repair driven by the jmap-test-suite.
Rocket.Chat vs Stalwart: editorial side-by-side
Rocket.Chat
6.3COMMS
Six release candidates into 8.7, and five of them are version bumps.
◆ Current state
Rocket.Chat is six candidates deep into 8.7.0, and the visible content of that train is thin. Five of the six most recent entries carry an identical body: a Meteor package bump with internal typings following. The engine floor holds steady across the whole window at Node 22.22.3, Deno 2.3.1, MongoDB 8.0, and Apps-Engine 1.65.1-rc.0. The one substantive change in the cycle sits back in 8.7.0-rc.0, which added session identification to the device management API.
◆ Where it's heading
This is a stabilization run rather than a feature cycle, and the same shape repeated in 8.6.0, whose rc.1 through rc.3 read the same way. Each cycle front-loads its minor changes into rc.0, then spends weeks on version bumps with isolated fixes folded in. For anyone reading the changelog, that means almost nothing is learnable between an rc.0 and the eventual release.
◆ Prediction
Expect 8.7.0 to reach general availability with a note consolidating the rc.0 session-management change and the scattered candidate fixes; on this pattern the next real signal comes with 8.8.0-rc.0, not from the remaining 8.7 candidates.
Stalwart
5.0COMMS
Stalwart is shipping email's next-generation auth stack while the specs are still in draft.
◆ Current state
Stalwart is an all-in-one mail and collaboration server — SMTP, IMAP, JMAP, CalDAV, CardDAV and WebDAV in one binary — releasing every one to two weeks on the 0.16.x line. The last two months read as a standards campaign: DKIM2 and the full DMARCbis set in 0.16.12, VAPID push in 0.16.14, FreeBSD support in 0.16.13, and a run of IMAP extensions (UIDONLY, UIDBATCHES, MESSAGELIMIT/SAVELIMIT) in 0.16.17. Between the additions, most of each release is JMAP conformance repair driven by the jmap-test-suite.
◆ Where it's heading
The project is building toward being the reference implementation of the modern mail stack — JMAP first, with the classic protocols held at parity rather than left behind. The fix lists have shifted in character over these eight releases: less "feature does not work", more "spec detail is wrong", which is what a codebase looks like as it converges on conformance. Security and multi-tenancy fixes keep appearing alongside the protocol work, indicating real deployments are exercising the newer subsystems.
◆ Prediction
The next releases most likely track revisions to the drafts already implemented — DKIM2, JMAP push and the calendar drafts are all still moving — rather than adding another protocol surface. Expect continued JMAP conformance fixes until the test suite stops producing them.
Alternatives to Rocket.Chat and Stalwart
Other Comms products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Rocket.Chat or Stalwart.
Synapse
Synapse alternates release candidates with security patches on a tight two-week cycle
Canary Mail
Canary Mail ships maintenance across four platform lines; features have gone quiet since April.
Bandwidth
Bandwidth is closing the gaps that used to require a support ticket
Beeper
Beeper stopped aggregating apps and started merging the people inside them.
Respond.io
respond.io is monetizing AI usage directly while putting an assistant that builds agents in every workspace.
See all Rocket.Chat alternatives → · See all Stalwart alternatives →
Recent activity from Rocket.Chat and Stalwart
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoStalwartIMAP gains UIDONLY, UIDBATCHES and message-limit extensions
- 5d agoRocket.Chat8.7.0-rc.6: Meteor version bump only
- 7d agoRocket.Chat8.7.0-rc.5: Meteor version bump only
- 8d agoRocket.Chat8.7.0-rc.4: audio attachments become seekable again
- 9d agoStalwartJMAP delivery push arrives; strict relays stop rejecting calendar mail
- 12d agoRocket.Chat8.7.0-rc.3: Meteor version bump only
- 15d agoStalwartFix-only release: JMAP semantics and a credential escalation
- 20d agoRocket.Chat8.7.0-rc.2: Meteor version bump only
- 20d agoRocket.Chat8.7.0-rc.1: Meteor version bump only
- 22d agoStalwartVAPID lands for JMAP Web Push
- 1mo agoStalwartFreeBSD support, plus OAuth scopes for IMAP, SMTP and Sieve
- 1mo agoStalwartDKIM2 and the full DMARCbis suite ship in one release ⚡
Frequently asked questions
What is the difference between Rocket.Chat and Stalwart?
They serve adjacent needs but don't currently overlap on shipped themes. Rocket.Chat is currently shipping more aggressively (velocity 6.3 vs 5.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Rocket.Chat better than Stalwart?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Rocket.Chat is currently shipping more aggressively (velocity 6.3 vs 5.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Comms products to evaluate alongside.
What are the best alternatives to Rocket.Chat?
Top Rocket.Chat alternatives in Comms are ranked by recent ship velocity. Browse the "Rocket.Chat alternatives" section above for the current picks, or visit /alternatives/rocketchat for the full list with editorial commentary on each.
What are the best alternatives to Stalwart?
Top Stalwart alternatives in Comms are ranked by recent ship velocity. Browse the "Stalwart alternatives" section above for the current picks, or visit /alternatives/stalwart for the full list with editorial commentary on each.